237 



Induration of tertiary rocks in Xortlieastern 

 Arkansas, '9.3, 219. 



Infection by bread, '95,46. 



Infection, conte.<t against, '91. 28. 



Infiltrating and staining in toto of heads of 

 Vernonia. method of, "94, 120. 



Infinite system of forms, '97, 80. 



Infinity and zero in algebra, '91, 20. 



In memoriam, '97. 20; '98, 20. 



Inoculation of animals with yeasts, '96, 186. 



Insect increase and decrease, '91, 'M. 



Insects, injurious, earliest published refer- 

 ence to. '91, 168. 



Insects of Tasmania, '91. 68. 



Integrals, reduction of. '97, 112. 



Integrations, some theorems of, '91, 63. 



Invertin fermentation, '91.30. 



Ionization experiments, '99, 98. 



Iron, autographic method of testing mag- 

 netic qualities of. '93, 269. 



Ischnoptera. '92. I'lS, 158. 



Ischnoptera bivittata. '92, 162. 



Ischnoptera pennsylvanica, '92, 158. 



Ischnoptera unicolor, '92, 160. 



Isoetes macrospores, '91, 17. 



Isopyrum biternum. .symbiosis of, '93, 254. 



Isosma in Indiana. '98, 227. 



Isthmus of Panama, '91, 24. 



Katydid, larger angular-winged, '92, 107. 



Katydid, narrow-winged, '92, 102. 



Katydid, oblong leaf-winged, '92, 104. 



Katydid, oljlique- winged, '92,107. 



Katydid, round-winged, '92, 105. 



Katydid, true, '92, 109. 



Katydid, Uhler's, '92. 106. 



Kelanea, '91, 23. 



Kellerman, W. A., '91.74. 



Kellicott. D. S., '91, 168; '95, 242, 251. 



Kendrick, Arthur, '98. 86; '00, 109. 



Kentucky fishes. '91, 31. 



Keokuk group, '91,14. 



Keokuk rocks, dip of, at Blooinington. '94,52. 



Ketols condensation with aeetophenone, 



'91,46. 

 Kettle holes, '95, .55. 

 Kindle. Edward M.. '92. 72; '9.3, 1.56; '94, 49, 



52, .54. 68. 

 Kirtland's warbler, '93, 224. 

 Kizer, E. I., '98. 222. 



Knipp. Chas. T.. '95. 62; '97,-59; '00. 90, 91, 95. 

 Knobstone formation in Indiana, '98, 283. 

 Knobstone group, '97. 253. 257, 258. 

 Knobstone group, distribution of. etc., '98 



289. 

 Knox County, cypress of. '97. 172. 

 Knox County plants, '91, 29. 



JASPER COUNTY, observations on glacial 



drift, '94, 43. 

 .Jetferson County birds. '91. 23. 

 Jefferson County butterflies, '91, 22. 

 Jefferson County cystidians. '91, 23. 

 Jefferson County wasps, '91, 23. 

 Jeffersonia diphylla. embryo-sac of, '94, 131. 

 .Jenkins.J. N., '94. 66. 

 Johnson County geo. section. '91, 17. 

 Johonnott, E. S.. Jr., '00, 110. 

 .lones, Lee H., '97. 257. 

 Jones. Walter, '92, 166; '94, 52. 

 Jones. W. J.. Jr.. '96, 112. 

 Jordan, D.S.. '91.21; '9.3.71. 

 Juday, Chancey, '96, 287. 

 Jug rock, '98,268. 

 .Tuglans nigra, '91. 25. 

 Juneo hyemalis, '91, 164. 



KAKERLAC AMERICANA, '92,157. 

 Kakerlac orientalis. '92,156. 

 Kankakee River, '91,39. 

 Kankakee salamander, '00, 165. 

 Kankakee Valley. '91,39; '98,277. 

 Karyokinesis in the embryo-sac. '98, 1(>4. 

 Katydids, '92,92,97. 

 Katydid, broad-winged, '92. 109. 

 Katydid, fork-tailed, '92, 101. 



LABES HYPHLOCYBAE, '92, 91. 



Laboratory, a new, '97, 65. 



Laboratory, botanical, working shelves for, 

 '94,61. 



Lagodon. '91. 19. 



Lake Cicott and Lake Maxinkuekee, notes 

 on flora of, '96, 116. 



Lake Cicott, location and topographv. '96, 

 117. 



Lake County, '96. 7.3. 



Lake County, extinct fauna of, '94. .)4. 



Lake Maxinkuekee. '97, .56; '98,70. 



Lake Maxinkuekee, flora of, 'OU. 124. 



Lake Maxinkuekee, location and topogra- 

 phy, '96. 118. 



Lake Michigan, '96, 72. 



Lake Ontario, angling in. '94. 81. 



Lake region of Northeastern Indiana, gen- 

 eral physiographic conditions, '96, 149. 



Lake region of Northeastern Indiana, notes 

 on the flora of, '96. 147. 



Lake region of Northeastern Indiana, out- 

 lines of, '96, 147. 



Lake region of Northeastern Indiana, physi- 

 ographic changes, '96, 150. 



Lake region of Northeastern Indiana, some 

 general observations, '96, 1-57. 



Lammellibranchiata, '91, 68. 



